"Good Job Mark! She is lucky she got a father and a baby sitter like you," another added.

"Perfect parenting," another commented.

In a Facebook post last month, before his first daughter Max with wife Priscilla Chan was born, Mark revealed he plans to take 2 months of paternity leave – which also gained approval from his millions of online followers.

A different kind of online reaction for Marissa Mayer

But we can't help to compare this outpouring of praise with the rather frosty response to news about Yahoo CEO's Marissa Mayer's parenting journey.

Marrisa gave birth to identical twin girls – making three children for the businesswoman and her husband Zachary Bogue.

Zack and I are excited to announce that our identical twin girls were born early this morning. Our whole family is doing great! @zackbogue

When news of the twins' birth was published on the People website, online comments were much less kind.

"Perfect timing Marissa! You can take the rest of the day off today, and tomorrow (maybe?) and be back to normal at the office by Monday. :)," one rather sarcastic comment read.

"Well, we know what her priorities are, and it’s not staying home and being a mommy. When her children are suddenly teenagers, I wonder if she’ll regret not spending more time with them. She can’t get back those precious years," another added.

So do you think the response to each person's baby news is just because of the amount of maternity or paternity leave they're taking?

Or do you think it has something to do with Marissa not being a 'dedicated' enough mum while Mark goes 'above and beyond' what's expected of a dad? Let us know in the comments below.